|On land/ off shore||Periods||Capacity of wind turbines Power of wind turbines (MW-electric)||Capacity of wind turbines Rotor surface of wind turbines (1,000 m2)||Windex (index for supply of wind) Value measured (1996-2005=100)||Windex (index for supply of wind) Seasonally adjusted (1996-2005=100)|
|Total wind energy||2019 2nd quarter*||.||.||.||.|
|Wind energy on shore||2019 2nd quarter*||.||.||.||.|
|Wind energy off shore||2019 2nd quarter*||.||.||.||.|
This table shows monthly, quarterly and annual figures of the production of electricity by wind energy, the capacity of wind turbines and an index for the amount of wind supply for the production of electricity. The figures are broken down by onshore and offshore wind. The index for the amount of wind is only available for wind turbines on land.
Data available from 2002 to June 2019.
Status of the figures:
The figures in this table are definite from January 2002 to December 2017, adjusted provisional from January 2018 to December 2018 and provisional from January 2019 onwards. Given that this table is stopped, the data will not be made definite.
Changes as of 11 September 2019:
None, this table has been stopped.
When will new figures be published?
No longer applicable.
This table, for the subject electricity production, is continued in the table Elektriciteitsbalans; aanbod en verbruik (Dutch only).
- Capacity of wind turbines
- Total of electrical power reported in megawatt and the total rotor surface reported in 1,000 m2.
This is measured at the end of the period under review, i.e. at the end of the month, quarter or year under review.
- Power of wind turbines
- Electrical power is the amount of electricity wind turbines can produce per unit of time (e.g. hourly) under optimal conditions.
- Rotor surface of wind turbines
- The surface covered by the rotating blades of the wind turbines.
- Windex (index for supply of wind)
- The supply of wind for wind energy is reported in the so-called Windex. The Windex is only available for wind on land. A Windex of 100 means that the supply of wind is equal to the average of all months in the period 1996-2005. This period is chosen because it is seen as a representative period for a long time series and also because a consistent time series of data is available for this period. The Windex until December 2007 comes from Wind Service Holland (WSH), and from January 2008 up to and including December 2014 from Statistics Netherlands.
Publication of the index for the supply of wind is ceased per January 2015, because the uncertainty for the long term trend is too large. See chapter 4 of the publication href="http://www.cbs.nl/nl-NL/menu/themas/industrie-energie/publicaties/publicaties/archief/2014/2014-hernieuwbare-energie-in-nederland-2013-pub.htm">Hernieuwbare Energie in Nederland 2013 (in Dutch) for more information.
- Value measured
- Seasonally adjusted
- In winter the wind usually blows harder than in summer. As a result, the average Windex in winter is usually higher than in summer. To review this seasonal effect a seasonally adjusted Windex is published.
For example: in January 2004 the Windex is 144. On average the Windex for January is 147. Therefore in January 2004 the wind was slightly below the average for January. Therefore the seasonally adjusted Windex is 144/147 * 100 = 98. A seasonally adjusted index below 100 means less wind than expected, and above 100 means more wind than expected.
The long-term average Windex by month and by quarter is calculated for the period 1996 to 2005 with the following values:
1st quarter: 133
2nd quarter: 81
3rd quarter: 65
4th quarter: 120.